Marc Diener, PH.D.
NPI 1255632337 · Psychologist · Hewlett, NY
Marc Diener, PH.D. is a Psychologist provider in Hewlett, NY (NPI 1255632337).
Provider details
- NPI number
- 1255632337
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 68017465 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-11-05
- Last updated
- 2013-07-10
Frequently asked questions
- What is Marc Diener's NPI number?
- Marc Diener's National Provider Identifier (NPI) is 1255632337, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Diener's specialty?
- Marc Diener is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Marc Diener located?
- Marc Diener's practice location on file with NPPES is 1800 Rockaway Ave, Hewlett, NY 11557-1665.
- What is Marc Diener's phone number?
- The practice phone number listed in the NPPES registry for Marc Diener is (646) 246-1662.
- Is Marc Diener's NPI active?
- Yes — Marc Diener's NPI (1255632337) is active in the NPPES registry as of the last update on 2013-07-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.